Rotary edge-trimmer.



'No. 729,085. PATENTED MAY 26, 1903. M. J. MoGRATH. ROTARY EDGE TRIMMER.

APPLIOATIDH FILED DEC. 11, 1802.

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mm b w-M fia UNITED STATES Patented May 26, 1903 PATENT OFFICE.

ROTARY EDGE-TRIMMER.

SPEGIFICATZON formingpart of Letters Patent N o. 729,085, dated. May 26, 1903.

Application filed December 11. 1902- Serial Nol34,743, (No model.)

T0 at whom it may concern.-

Be it known that I, MICHAEL J. MOGRATH, of Brockton, in the county of Plymouth and State of Massachusetts, have invented certain new and useful Improvements in Rotary Edge-Trimmers, of which the following is a specification.

This invention relates to rotary trimmers for trimming the sole edges of boots and shoes; and it has for its object to provide an improved construction of means for protecting those portions of the upper adjacent to the solo from contact with the revolving cutter.

The guard which I employ does not take the place of the ordinary revolving end shield on the outer end of an edge-trimmer, but may be employed on trimmers having this revolving shield, the object being to enable an ordinary trimmer to be employed with or without the action of my improved guard, the guard for this purpose being movable into and out of operative position.

Of theaccompanying drawings,Figure 1 represents a side elevation of an edge-trimmer provided with a guard constructed in accordance with my invention. Fig. 2 represents a plan view. Fig. 3 represents an end elevation.

The same reference characters indicate the same parts in all the figures.

In the drawings, indicates one of the bearings of the trimming-machine journaling the trimmer shaft or arbor 11, which carries at its outer end the sole-edge trimmer 12. The latter is provided with the usual or any suitable form of cutting-blades, and at its end is provided with an end plate or shield 13, whose edge projects slightly beyond the termination of the cutter-blades, said shield being secured by a screw 14 to the arbor and cutter-blades, so as to rotate therewith.

15 is a guard-supporting arm having its innor end secured to the upper side of the bearing 10 by means of the oil-cup 16, said arm having a forked rear end 17, abutted by a washer 18, which is held down by the oilcup.

19 is a screw threaded into the arm 15 and abutting the bearing 10 for the purpose of adjusting the height of the outer end of said arm. Said arm 15 is sufficiently resilient to permit such adjustment to be made.

Hinged at 20 to the outer end of arm 15, so

as to normally depend therefrom in a vertical direction, is an upper-guard 21, consisting of a plate having a thin lower edge residing close to the lower edge of the shield 13, but preferably slightly above said shield edge. A spring latch or catch 22, attached to the arm 15, holds the upper-guard 21 in its normal position, but is adapted to be sprung outwardly to release the guard and allow it to be swung up to the dotted-line position indicated in Fig. 1 when it is desired to employ the trimmer in the ordinary manner without the upper-guard or to change cutters on the trimmer. Owing to the spring-hinged construction described, the upper guard may be thrown up or down quickly between the positions indicated by full and dotted lines in Fig. l. The screw 19 affords a means for adjusting the lower edge of guard 21, so as to bring it to its proper relation with the edge of the shield 13, and the guard is provided with a vertically-elongated slot 23, occupied by the screw 14, whereby such vertical adjustment is permitted.

A particular utility of this invention resides in the fact that if an operator desires to use a trimmer with an ordinary rotating end shield, but without an upper-guard, the 1atter may be quickly thrown up to a position where it will be entirely out of the way and still without having to entirely detach it or remove or adjust any screws. On the other hand, if it is desired that the shoe-upper'shall be protected from abrasion by the end shield, which rotates rapidly with the trimmer, the

upper-guard may be thrown down to the po-.

sition shown by full lines in Fig. 1.

As above described the slot or orifice 23 is occupied by the screw 14 when the upperguard is in its lower or operative position. Therefore the sides of the screw are in position to act as stops or abutments for the sides of the slot to prevent edgewise displacement of the guard when a shoe is moved along or bears against the lateral edge of the guard. In other words, the screw acts to steady the guard, so that it cannot be displaced edgewise in spite of the fact that its supportingarm 15 is resilient.

I claim- 1. In an edge-trimmer, the combination of a rotary shaft or support, trimming means ICO and an end plate or shield carried by said support, a fixed upper-guard support, and an upper-guard hinged to swing on said support into and out of operative relation with respect to said shield, whereby said guard may be quickly thrown from one to the other of such positions.

2. In an edge-trimmer, the combination of a rotary shaft or support, trimming means carried by said support, an end plate or shield, a relatively fixed or non-rotating pivoted upper-guard, and spring-latching means normally holding said upper-guard in operative relation with respect to the trimming means.

In an edge-trimmer, the combination of a rotary shaft or support, a bearing therefor, trimming means carried by said support, an upper-guard support, means detachably securing the last-said support to said bearing, an upper-guard carried by said support and projecting in front of said trimming means, and provisions for varying the angle of said upper-guard support for the purpose of adjusting the position of said guardradially of the trimming means.

4. In an edge-trimmer, the combination of a rotary shaft or support, a bearing therefor, trimming means carried by said support, a resilient arm connected to said bearing and having an upper-guard at its outer end, and a screw threaded in said arm and abutting the said bearing whereby the height of the outer end of the arm may be adjusted.

5. In an edge trimmer, the combination with a rotary shaft carrying a trimmer and having an end plate or shield, of a hinged upper-guard adapted to be moved to or from an operative position adjacent to the shield, and means for steadying the guard against edgewise displacement when in operative position.

6. In an edge-trimmer, the combination with a rotary shaft carrying a trimmer and having an end plate or shield, of a resilient upper-guard support, an upper-guard hinged to said support and adapted to be moved to or from an operative position adjacent to the shield, and .means for steadying the guard against edgewise displacement when in operative position.

7. In an edge trimmer, the combination with a rotary shaft carrying a trimmer, of an end plate or shield for said trimmer, a screw securing the shield in place, and a hinged upper-guard adapted to be moved to or from an operative position adjacent to the shield,

projecting portion of the screw when the shield is in operative position.

In testimony whereof I have atfixed my signature in presence of two witnesses.

MICHAEL J. MCGRATH.

Witnesses:

ROBERT H. DEIGHTON, DANIEL MCGRATH.

said shield having an orifice occupied by the 

